[DaveBlake]

OK got it. I guess it's a feature, but I struggle to see a use case where you would want a role view that only selected from album artists.

A use case is for similar reasons to seeing just album artists rather than all the song artists, reducing clutter. Say you had tagged so that most tracks have a composer, you may not always want to see all of them but just the primary ones e.g. those that are also album artists. This works particularly well when also combined with a genre filter - a way to see the classical album composers not jumbled with conductors and orchestras etc.

But I am open to feedback. Maybe the default behaviour should be albumartistsonly=false regardless of the global setting?

At the moment the only way to adjust what is seen is using custom nodes, perhaps an easier UI is needed? Initially I guess a clear wiki explantaion or tutorial video will have to suffice.